Rock crusher



April 9, 1929.

A. W. BARTON ET AL ROCK CRUSHER Original Filed Dec, 15, 1924 '5 Sheets-Sheet 1 M. Fergusonw -J W At forneys.

x In vemorst- 9 8 ANV. Bar-ton.

E. DuLac.

1 1929 A. w. BARTON ET AL 1,708,562

ROCK CRUSHER Original Filed Dec. 15, 1924 5 Sheets-Sheet 2 45'. M Fr'guson. By 7 4 W ter". 1/

1 9, 1929- A. w. B ARTON ET AL I 1,708,562

I ROCK CRUSHER Original Fllgd Dec: 15, 1924 s Sheets-Sheet 5 Inventors.- AMI Borton E. DuLac. I M f'er uson. By 94w 4 Attorneys.

P 1929. A. w. BARTofi ET AL 1,708,562

ROCK CRUSHER Original File Dec. 15, 1924 s Sheets-Sheet 4 $825 32833 A o 1 o AAA/Barton. E. D uLoc. E. M F'er' uson.

AH'Orneys.

In ve n fora;

April 9, A. w. BARTON E T AL I 1,708,562

' ROCK CRUSHER Original Filed Dec, 15, 1924 5 Sheets-Sheet 5 In ven fore: AW. Bor 'tonv E. Du Lac.

I E M Ferguson.

Attorneys, I

Patented Apr. 9, a 1929.

UNITED STATES PATENT QFFICE.

AtnEa Beaten EQMIIN DU Les A EDWIN M- talis an O M N P Minnes ta; sen) BARTON Assistant e ONE-SIXTH o slim as me Ana 01-mr to ell? ra ew- RO CK ORUSHER.

Application filed December 15, 1924, Serial Il'o. 756,005. Renewed August 27, 1928.

Our invention relates to rock crushers. The term rock crushers is employed in its broad sense and is intended to designate a machine having two cooperating rocking beams between which various materials may be crushed or pulverized. Among the objects of our invention are to provide a machine in which strains are reduced to a minimum, in which the material will be discharged mechanically rather than by gravity and of uniform size, in which the leverage is applied substantially at right angles, and in which j aw plates carried by the rocking beams have their various operating surfaces each traveling on distinct radii in such manner as to trap and accelerate the passage of material through the machine in a very effective manner.

The full objects and advantages of our invention will appear in connection with the d etailed description thereof and the novel features of our inventive idea will be particularly pointed out in the claims,

In the accompanying drawings, which illustrate a practical embodiment of our invention,

Fig. 1 is a side elevational view of the machine. Fig. 2 is a longitudinal vertical sectional View of the machine. Fig. 3 is a top plan View. ig. 4 is a view in horizontal section on the line 44 of Fig. 2. Fig. 5 an enlarged diagrammatic view illustrating the operation of the machine. 7

Referring to the construction shown in the drawings, a frame is provided which consists of two side members 10 and 12 and two end members 14 and 16. The side members, as will be apparent from Fig. 1, are provided with outstanding ribs and also with bearings which will be referred to later. The driving shaft 18 extends transversely through the frame near one end thereof, being mounted in bearings 20 carried by the side members. A fly wheel 22 is shown secured to one end of the shaft 18, and another one may be secured to the other end, and this shaft within the frame is formed with an eccentric portion 24 around which are two longitudinally spaced bushings 26 and 28 separated by a ring 30. Spaced around the bushings 26 and 28 are two bushings 82 and 34, also separated from each other by the ring 30, and the space between the inner and outer pairs of bushings is filled with roller bearings 36. The outer bushl I ings 34 are placed within a hub 38 on one end of a pitman 40 whose other end has a hub 42. A beam 44 is pivot-ally monntea near its lower extremity by means of a transverse shaft 46 passing through the side frame members. The outer extremity of the beam 44- is pivotally attached pinned to the hub 42 of the pitman 40, by a transverse shaft'48. A second beam 50 is pivotally mounted near its lower extremity by means of a shaft 52 whose ends are mounted in horizontally adjustable bearings 54: mounted in slidcways formed in the side frame members and held in adjustable positron by oppositely-arranged set-screws 56 and 58. Transverse pins 60 and 62 pass through openings in the beams 44 and 50,"respectively, formed toward the upward ends of the beam, and the ends of these pins are connected by side halts 64. The inner face ofthe beam 44 carries a jaw plate 66 held between a shoulder 68 at the bottom of the beam and a clamp 70 at the top thereof. The inner face of the beam 50 carries a jaw plate 72 held between a shoulder 74 near the bottom of this beam and a clamp 76 at the top thereof. The two jaw plates, as shown in F 4, are provided with cheek flan es T8 and 80, which keep the Sides of the throat between the jaw plates closed, as the latter move relatively to each other. In the embodiment shown it will be seen by referring to Figs. 2 and 5 that both of the jaw plates are reversely curved toward their upper and lower ends. The jaw plate 66 is convened at 82 and concaved at 84, while the jaw plate 72 is concaved at 86, opposite the convened portion 82, and is convened at SSyoppositethe concaved portion 84. Between the convex portion 82 and the concave portion 84, the aw plate 66 has a flat portion extending between the places marked (Z and 6. Between the concave portion 86 and the convex portion 88, the jaw plate 72 has a flat portion' extending between the places marked 7 and g. The fiat portion on the aw plate 66 is lower than the fiat portion on the jaw plate 72 so that the two flat portions only partially overlap each other, and a part of the flat portion on the jaw plate 66 is opposite part of the concave portion 88 of the aw plate 72 while a part of the flat portion on the aw plate 72 is opposite part of the concave portion 82 of the jaw plate 66. r

The operation and advantagesof our invention will be readily understood in connection with the foregoing description. It is to be noted that the two beams are linked together near the top, and that the beam l4 1s given a rocking or pivotal movement upon theshaft 46, while the beam 50 is given a rocking or pivotal movement upon the shaft 52. The result is that both beams move simultaneously in the same direction toward and away from the driving shaft to produce an oscillating slightly expanding and contracting movement and a slightly vertical relative movement at the top of the adjacent jaw plates, which movement progressively changes for the lower points on the jaw plates so that the movement of the two jaw plates at the place of discharge is substantially vertical and in opposite directions. This movement is designed to trap, roll and crush the material which is fed into the throat of the machine and mechanically accelerate its downward passage to and through the discharge opening. Every part of the jaw plates, considering upper and lower portions, moves on a distinctv radius broad in its horizontal scope at the top and changing gradually a-nd progressively to vertical movement at or near the bottom. This movement results in maintaining a constant space between the jaws at the point of discharge and prevents oversize of the crushed material in the discharge. 7 Slightly varying the location of.

the fulcrum and pivots and the contour of the jaw plates increases or decreases the expansion and contractionofv the space separating the jaw plates at the top and the amount of vertical movement at the bottom. Whenintended to pulverize or powder the material, the machine will be arranged to give a maximum vertical movement and a minimum amount of expansion and contraction. For commercialrock crushing, the machine will be arranged to give a minimum amount of vertical movement. The reversely-curved' concavo-convex jaw plates which at the top travel approximately in the same direction and each portion of which moves on a distinct radius provide a particularly efficient movement fortrapping and accelerating the material through the machine, and further provide a construction which greatly increases the-crushing leverage as compared with previous crushers with which we are familiar. The vertical movement in reverse directions of the jaw plates at the point of discharge causes the discharge to be made mechanically rather than by gravity. The size of the discharged product may be varied by changing the position ofthe adjustable bearings 54. The employment of the connecting links between the two, beams greatly reduces the strain on the frame of the machine. By refer- 1 ring to Fig. 2 it willbe seen that the manner in which the beams are operated from the'eccentric permits the application of leverage at right angles, which increases the leverage and reduces strains. The pitman or power arm 40 will remain at substantially right angles to the beam Mas the eccentric 524 rotates. The extent and direction of the various parts will be apparent from Flg. 5. The arrow A indicates the direction of movement of the shaft 48, the extent of movement being between the two points a and a at opposite sides of the neutral point 50. The arrow B indicates the direction of movement of the pin 60, the extent of movement being between the two points. I) and I) at opposite sides of the neutral point 1 The arrow C indicates the direction of movement of the pin 62, the extent of movement being between the two points 0 and c at opposite sides of the neutral point e. The arrows D indicate the direction of movement of the various parts of the jaw 66 around the axis of the shaft 46 as a center, the extent of movement being between the two dotted lines. indicate the direct-ion of movement of'the various parts of the jaw 72 around the axis of the shaft 52 as a center, the extent of'movement being between the two dotted lines.

It will be noted from Figs. 1, 2 and 5 that the shaft 52 is mounted considerablylower than the shaft 46. On account of this mounting, in combination with the connecting links 64, the various parts of the aw 72 carried by the beam are caused to rock in the direction indicated by the arrows E in Fig. 5 while the various parts of the jaw 66 carried by the beam 44; rock in the direction indicated by the arrows D in this figure. The result is that the upper portions of the two beams rock simultaneously in the same direction with the extent of rocking movement of the beam 44 greater than that of the beam 50 and with the discharge passage between the lower portions of the beams maintained of fixed size. Furthermore, the beams at their top have an expanding and contracting movement and a slightly relative vertical movement which progressively changes downwardly. so i that the beams at the place of discharge have a movement substantially vertical and in opposite directions. It is further to be noted that The arrows E the crushing hopper provided by the two jaws mounted and moved in the manner herein specified has no neutral or non-operative por tlonifrom 1ts mouth at the widest point to the point where the members come close together accumulate and clog the flow therethrough, as

will happen in constructions having a neutral or'non-crushing zone in the length of the hopper passageway. This efiect results from the relative position of the pivots of the two jaws out of horizontal plane and of the link pivots .out of the vertical plane of the jaw pivots.

We claim:

1. A machine of the class described comprising a beam provided with a working face and pivoted near its lower extremity, means for rocking said beam on its pivot, a second beam provided with a working face and pivoted near its lower extremity and at a point lower than the pivotal point of said first-mentioned beam, and links connecting the upper portions of said beams, the pivots of said beams being located in proximity to their working faces.

2. A machine of the class described comprising a beam provided with a working face and pivoted near its lower extremity, a second beam provided with a working face and pivoted near its lower extremity, and means for causing the upper portions of said beams to rock simultaneously in the same direction with the extent of rocking movement of one beam greaterthan that of the other and with the discharge passage between the lower portions of said beams maintained of fixed size, the pivots of said beams being located in proximity to their working faces.

3. A machine of the class described comprising a beam provided with a working face and pivoted near its lower extremity, a second beam provided with a working face and pivoted near its lower extremity, and means for causing rocking movement of said beams in such manner that said beams at their top have an expanding and contracting movement and a slightly relative vertical movement which progressively changes downwardly so that said beams at the place of discharge have a movement substantially vertical and in opposite directions, the pivots of said beams being located in proximity to their working faces.

l. A machine of the class described comprising a beam pivoted near its lower extremity, said beam having a reversely curved working surface to provide a convex portion and a concave portion, a second beam pivoted near its lower extremit 1 and at a point lower than the pivoted point of said first-mentioned beam, said second beam having a reversel curved working surface provided with a concave portion opposite the convex portion of said first beam and a convex port-ion opposite the concave portion of said first beam, and means for rocking said beams.

5. A machine of the class described comprising a beam pivoted near its lower extremity, means for rocking said beam on its pivot, a second beam pivoted near its lower extremity, and at a point lower than the pivotal point of said first-mentioned beam, links connecting the upper portions of said beams, a jaw plate secured to said first beam, said jaw plate having a reversely curved surface to provide a convex portion and a concave portion, and a jaw plate secured to said second beam, said second jaw plate having a reversely-curved surface provided with a concave portion opposite the convex portion of said first aw plate and a convex portion opposite the concave portion of said first jaw plate.

In testimony whereof we hereunto affix our signatures.

ALBERT BARTON. EDMUND DU LAG. EDWVIN M. FERGUSON. 

